[POWERPC] bootwrapper: Add fsl_get_immr() and 8xx/pq2 clock functions.
fsl_get_immr() uses /soc/ranges to determine the immr.
mpc885_get_clock() transforms a crystal frequency into a system frequency
according to the PLL register settings.
pq2_get_clocks() does the same as the above for the PowerQUICC II,
except that it produces several different clocks.
The mpc8xx/pq2 set_clocks() functions modify common properties in
the device tree based on the given clock data.
The mpc885/pq2 fixup_clocks() functions call get_clocks(), and
pass the results to set_clocks().
Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/boot/fsl-soc.c b/arch/powerpc/boot/fsl-soc.c
new file mode 100644
index 0000000..b835ed6
--- /dev/null
+++ b/arch/powerpc/boot/fsl-soc.c
@@ -0,0 +1,57 @@
+/*
+ * Freescale SOC support functions
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include "ops.h"
+#include "types.h"
+#include "fsl-soc.h"
+#include "stdio.h"
+
+static u32 prop_buf[MAX_PROP_LEN / 4];
+
+u32 *fsl_get_immr(void)
+{
+ void *soc;
+ unsigned long ret = 0;
+
+ soc = find_node_by_devtype(NULL, "soc");
+ if (soc) {
+ int size;
+ u32 naddr;
+
+ size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
+ if (size == 4)
+ naddr = prop_buf[0];
+ else
+ naddr = 2;
+
+ if (naddr != 1 && naddr != 2)
+ goto err;
+
+ size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
+
+ if (size < 12)
+ goto err;
+ if (prop_buf[0] != 0)
+ goto err;
+ if (naddr == 2 && prop_buf[1] != 0)
+ goto err;
+
+ if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
+ ret = 0;
+ }
+
+err:
+ if (!ret)
+ printf("fsl_get_immr: Failed to find immr base\r\n");
+
+ return (u32 *)ret;
+}